FBI Agent Frank O’Neill, Dr. Malcolm Perry (3 different appearances), Secret Service Agent Clint Hill, Secret Service Agent Paul Landis, Secret Service Agent Sam Kinney, Mortician Tom Robinson, Dr. William Zedlitz, James Curtis Jenkins, Dr. Joe D. Goldstrich, Nurse Audrey Bell (repeated), Floyd Riebe (repeated/extended), Jerrol Custer (repeated/extended), Dr. Kenneth Salyer, Dr. Robert McClelland (4 different appearances), Dr. Ronald Jones (2 different appearances), Dr. Paul Peters (2 different appearances), Dr. Richard Dulany, Dr. Charles Carrico, Dr. Marion “Pepper” Jenkins, Paul O’Connor, Secret Service Agent Winston Lawson, Phil Willis, Marilyn Willis, Linda Willis, Dr. Charles Crenshaw, Dr. Charles Baxter, Nurse Sharon Tuohy, Nurse Phyllis Hall, Dr. Robert Schorlemer, Aubrey Rike, Theran Ward